Recently at work Outlook 200 was upgraded to Outlook 2002
with SP2.  Now when I try to select names from a
distribution list, by double clicking the distribution
list, I get the menu that when you try to update the
address book's distribution list (same window to add or
remove members).  Basically, you do not have the option of
adding names from the distribution list to TO: or CC:
section of the message.  

In the previous version of outlook, when double clicking a
distribution list, the options window would have the
members names on the right side and once you select the
members, it would ask you if you want to place the member
in the To, or CC box.